NORTH AMERICAN COLEOPTERA. 289 



tlie elnw is stronger and mure arcuate than the others. The figures 

 on the phite represent this chiw as seen on the outer side (42) or 

 inner side (43). The claws of the posterior tarsi are alike and do 

 not greatly differ from those of the front feet, except that they are 

 slightly more slender. The claws of all the tarsi of the female are 

 of the ordinary Lachnosterna type as seen in thefusca group (fig. 4(5 ,• 

 There is very little resemblance in the claws of the male to Phy- 

 talus, or in fact any of the genera of Rhizotrogini now known to 

 me, and any separation of the species as a distinct genus must be 

 based purely on the male sexual characters. 



78. Li. lieterodoxa n. sp.— Oblong, pale rufotestaceous, head and thorax 

 slightly darker, surface very glossy. Clypeus suhtruncate, faintly sinuate at 

 middle, margin moderately widely reflexed, surface moderatelj' coarsely and 

 closely punctate, front much itiore coarsely punctured. Thorax narrower in 

 front, sides arcuate, the margin entire or subcrenate, with cilire. disc smooth with 

 very sparse irregularly placed punctures, with large smooth intervals. Elytra 

 with moderately coarse not closely placed punctures, the sutural costa alone dis- 

 tinct, the others entirely ol)literated. Pygidium smooth, indistinctly sparsely 

 punctate. Metasternum densely punctured, the hair moderately long, not dense, 

 similar in sexes. Abdomen very sparsely punctate at the sides. Last joint of 

 maxillary palpi fusiform, not impressed, flaws dissimilar in the sexes. Length 

 .56 inch : 14 mm. 



Male. — Anteunal club nearly one and a half times the length of 

 the stem. Abdomen concave at middle, the last segment slightly 

 granular with a linear median impression. Spurs of hind tibite 

 slender and free. Claws unlike on the three pairs of legs. Pygidium 

 broader than long, regularly convex. 



Female. — Antennal club shorter than the funicle. Tarsal claws 

 normally toothed and similar on all the feet. Pygidium as long as 

 wide, obtusely prominent near the apex. Hind tarsi shorter tlisin in 

 the male. 



At first glance this species is not very unlike crinita in form and 

 color, although with a more shining surface. 



This species was collected with fucata in southern Arizona, oi- pos- 

 sibly in Chihuahua, by Mr. C. G. Pringle, a well-known l)otanical 

 collector of Charlotte, Vermont. 



To this group L. ravida BL, of the Mexican fauna, should be re- 

 ferred. It resembles hetcrodoxa, but is more robust, the surface more 

 coarsely punctured and less shining. The antennal club of the male 

 is scarcely longer than the stem. The tooth of the claws is longer 

 and less triangular. The outer claw of the middle tarsus is similar 

 in the two species. 



TRANS. AMEK. ENT. SOC. XIV. (37) DECEMBER, 1887. 



